The .NET gives us flexibility to work with the XML files easily. .NET provides following five namespaces for XML manipulation.

1. System.Xml:- Contains major XML classes.This namespace contains many classes to read and write XML documents.Some classes under this namespace are XmlReader, XmlTextReader, XmlValidatingReader, XmlNodeReader, XmlWriter, and XmlTextWriter.


2. System.Xml.Schema:- Contains classes which work with XML schemas. XmlSchema, XmlSchemaAll, XmlSchemaXPath, and XmlSchemaType are the classes comes under this namespace.. 


3. System.Xml.Serialization:- Contains classes that are used to serialize objects into XML format documents or streams.


4. System.Xml.XPath:- Contains XPath related classes to use XPath specifications. XPathDocument, XPathExression, XPathNavigator, and XPathNodeIterator classes comes under this namespace..


5. System.Xml.Xsl :- Contains classes to work with XSLT transformations.

Example: Demonstrate Creation of XML Document

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Xml;

namespace _CSharpApplication

{

  public partial class Form10 : Form

    {

    public Form10()

        {

    InitializeComponent();

        }

    private void button1_Click( object sender, EventArgs e)

        {

        XmlDocument xmldoc;

        XmlNode xmlnode;

        XmlElement xmlelem;

        XmlElement xmlelem2;

        XmlElement xmlelem3;

        XmlText xmltext;

        xmldoc= new XmlDocument ();

    //XML DECLARATION SECTION

        xmlnode=xmldoc.CreateNode( XmlNodeType .XmlDeclaration, "" , "" );

        xmldoc.AppendChild(xmlnode);

    //STARTING NODE

        xmlelem=xmldoc.CreateElement( "" ,txtRoot.Text, "" );

        xmltext=xmldoc.CreateTextNode(txtRootDesc.Text);

        xmlelem.AppendChild(xmltext);

        xmldoc.AppendChild(xmlelem);

    //ADD CHILD ELEMENT TO THIS NODE

        xmlelem2=xmldoc.CreateElement( "" ,txtFirstChild.Text, "" );

        xmltext=xmldoc.CreateTextNode(txtFirstChildDesc.Text);

        xmlelem2.AppendChild(xmltext);

        xmldoc.ChildNodes.Item(1).AppendChild(xmlelem2);

    //ADD CHILD ELEMENT TO THIS NODE

        xmlelem3 = xmldoc.CreateElement( "" ,txtSecondChild.Text, "" );

        xmltext = xmldoc.CreateTextNode(txtSecondChildDesc.Text);

        xmlelem3.AppendChild(xmltext);

        xmldoc.ChildNodes.Item(1).AppendChild(xmlelem3);

        //SAVE THE XML DOCUMENT IN A FILE "C:\CREATEXML.XML"

    try {

            xmldoc.Save( "c:\\CREATEXMLDocument.xml" );

        } catch ( Exception ex) {

        Console.WriteLine(ex.Source);

        }

    MessageBox.Show( "***********XML DOCUMENT CREATED************" );

    }

 }

}

Output:

Clicking on the “Create XML Document” after filling all the fields.

Generated XML files looks like:

<?xml version="1.0" ?>

<RootName>

  <FirstChildName> FirstChildDesc </FirstChildName>

  <SecondChildName> SecondChildDesc </SecondChildName>

</RootName>